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Anthraquinone Dye | Open Access Journals
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Journal of Environmental Analytical Chemistry

ISSN: 2380-2391

Open Access

Anthraquinone Dye

Anthraquinone, also called anthracenedione or dioxoanthracene, is an aromatic organic compound with formula C14H8O2. Isomers include various quinone derivatives. The term anthraquinone, however refers to the isomer, 9,10-anthraquinone (IUPAC: 9,10-dioxoanthracene) wherein the keto groups are located on the central ring. It is a building block of many dyes and is used in bleaching pulp for papermaking. It is a yellow, highly crystalline solid, poorly soluble in water but soluble in hot organic solvents. It is almost completely insoluble in ethanol near room temperature but 2.25 g will dissolve in 100 g of boiling ethanol. Anthraquinone dye, any of a group of organic dyes having molecular structures based upon that of anthraquinone. The group is subdivided according to the methods best suited to their application to various fibres. An important class of synthetic vat dyes whose structure is based on anthraquinone. The resonance structure from the aromatic rings and the carbonyl groups provide the chromophore. Anthraquinone dyes were first sold commercially in 1901. They are vat dyes that must first be reduced with caustic soda and sodium hydrosulfite to produce a soluble compound, then once impregnated in the fiber and dried, they are oxidized with sodium perborate to form the original colorant. Anthraquinone dyes are lightfast and wash fast.

 

 

Anthraquinone, also called anthracenedione or dioxoanthracene, is an aromatic organic compound with the formula C14H8O2. The isomers include various quinone derivatives. The term anthraquinone, however, refers to the isomer 9,10-anthraquinone (IUPAC: 9,10-dioxoanthracene) in which the keto groups are located on the central ring. It is a building block of many dyes and is used in the bleaching of paper pulp. It is a yellow solid, very crystalline, sparingly soluble in water but soluble in hot organic solvents. It is almost completely insoluble in ethanol near room temperature but 2.25 g will dissolve in 100 g of boiling ethanol. Anthraquinone dye, any one of a group of organic dyes having molecular structures based on that of anthraquinone. The group is subdivided according to the methods best suited to their application on different fibers. An important class of synthetic dyes for tanks whose structure is based on anthraquinone. The resonance structure of aromatic rings and carbonyl groups provides the chromophore. Anthraquinone dyes were first sold commercially in 1901. They are vat dyes which must first be reduced with caustic soda and sodium hydrosulfite to produce a soluble compound, then once impregnated in the fiber and dried, they are oxidized with sodium perborate to form the original dye. Anthraquinone dyes are lightfast and wash quickly.

 

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